Decorate brownies. Using tinted icing, Sugar Writer and sanding sugars, decorate brownies.
Yellow Chevron, Black Chevron and Heart Brownies: Using white icing, spatula ice brownies smooth. Using Sugar Writer and Yellow and Black sugars, make designs on brownies.
Black, White and Yellow Triangle Brownie: Lightly mark diagonal line on top of brownie. Using black icing, spatula ice one half smooth; repeat on other half with white icing. Using Sugar Writer and Yellow sugars, make triangle on white half of brownie.
Striped Brownie: Using white icing, spatula ice brownie smooth. Prepare decorating bag with white icing; cut medium hole in tip. Pipe heart shape in center of brownie. Smooth with spatula. Cover in Yellow sugar using Sugar Writer. Prepare two decorating bags with tip 47; fill separately with white and black icing. Alternate piping horizontal white and black stripes on brownie.